Until some 3 years ago, I used to regularly jump between several desktop environments.
MATE, Cinnamon, XFCE, Unity, GNOME, Budgie and Plasma. I liked all of them in their own way, and could see myself using either one, though XFCE has always been my favorite since I came to Linux (Unity was great to use though, it was just rough around some edges).
But as of 2022, having made another round of DE-hopping, I can't help but feel that GNOME and Plasma are getting much ahead of the others. Modern, consistent, plenty of features, able to give a run for their money against proprietary OS. I've been using KDE Plasma mostly, though I've enjoyed GNOME 41 for a while as well (42 has some bugs and issues that need ironing out). In comparison, my beloved XFCE does feel ancient and archaic now, and I do feel like I'm missing out on a lot of stuff. That's maybe a sign that GNOME and Plasma have been improving tremendously in past few years. Even Cinnamon is suffering from lack of Wayland support and it shows in screen tearing and sometimes lag issues during games. Unlike in the past, I can't see myself returning to any of these other desktops anymore. By no means do I want them to fade away, but it's clear that the landscape has greatly changed from what it was just a few years ago.